2121233143 has 4 divisors (see below), whose sum is σ = 2123328168. Its totient is φ = 2119138120.

The previous prime is 2121233141. The next prime is 2121233161. The reversal of 2121233143 is 3413321212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121233143 - 2¹ = 2121233141 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121233141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045993 + ... + 1048018.

It is an arithmetic number, because the mean of its divisors is an integer number (530832042).

Almost surely, 2^2121233143 is an apocalyptic number.

2121233143 is a deficient number, since it is larger than the sum of its proper divisors (2095025).

2121233143 is a wasteful number, since it uses less digits than its factorization.

2121233143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095024.

The product of its digits is 864, while the sum is 22.

The square root of 2121233143 is about 46056.8468634143. The cubic root of 2121233143 is about 1284.8806871916.

Adding to 2121233143 its reverse (3413321212), we get a palindrome (5534554355).

The spelling of 2121233143 in words is "two billion, one hundred twenty-one million, two hundred thirty-three thousand, one hundred forty-three".